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  • Title: Role of hemorrhage in the induction of systemic inflammation and remote organ damage: analysis of combined pseudo-fracture and hemorrhagic shock.
    Author: Pfeifer R, Kobbe P, Darwiche SS, Billiar TR, Pape HC.
    Journal: J Orthop Res; 2011 Feb; 29(2):270-4. PubMed ID: 20690183.
    Abstract:
    This study was performed to analyze the role of hemorrhage-induced hypotension in the induction of systemic inflammation and remote organ dysfunction. Male C57/BL6 mice (6- to 10-week old and 20-30 g) were used. Animals were either subjected to pseudo-fracture [PF; standardized soft-tissue injury and injection of crushed bone, PF group: n = 9], or PF combined with hemorrhagic shock (HS + PF group: n = 6). Endpoint was 6 h. Systemic inflammation was assessed by IL-6 and IL-10 levels. Myeloperoxidase (MPO) and NF-κB activity in the lung and liver tissue were obtained to assess remote organ damage. The increases of systemic cytokines are similar for animals subjected to PF and PF + HS (IL-6: 189 pg/ml ± 32.5 vs. 160 pg/ml ± 5.3; IL-10: 60.3 pg/ml ± 15.8 vs. 88 pg/ml ± 32.4). Furthermore, the features (ALT; NF-κB) of liver injury are equally elevated in mice subjected to PF (76.9 U/L ± 4.5) and HS + PF (80 U/L ± 5.5). Lung injury, addressed by MPO activity was more severe in group HS + PF (2.95 ng/ml ± 0.32) than in group PF (1.21 ng/ml ± 0.2). Both PF and additional HS cause a systemic inflammatory response. In addition, hemorrhage seems to be associated with remote affects on the lung.
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